BUILT-IN MATHEMATICA SYMBOL
Defer
Defer[expr]
yields an object that displays as the unevaluated form of expr, but that is evaluated if it is explicitly given as Mathematica input.
- Defer[expr] returns an object that remains unchanged until it is explicitly supplied as Mathematica input and evaluated using Shift+Enter, , etc.
- Defer gives an object whose evaluation is merely deferred until it is explicitly given as Mathematica input; HoldForm gives an object that is never evaluated.
- If an object contains several levels of nested Defer constructs, one level is removed each time the object is evaluated as Mathematica input.
By default, arguments are evaluated:
| Out[1]= |  |
Use Defer to display an unevaluated form:
| Out[2]= |  |
Copy the previous output and evaluate:
| Out[3]= |  |
Use Defer to create cells with unevaluated contents:
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